The National Test House (NTH) with its headquarters at Kolkata is a Government laboratory of national importance in the field of testing and evaluation of materials and products of all engineering branches except Food, Pharmaceuticals and Arms and Ammunition. It is also providing calibration services and actively supports the formulation of National Standards since independence. The objective of the NTH is to improve Indian products to meet the requirements of National/International Standards for their acceptability in the global market. The NTH with its headquarters in Kolkata functions through six regional laboratories located in Kolkata, Mumbai, Chennai, Ghaziabad, Jaipur and Guwahati. There is also a modern laboratory complex of the NTH located at Salt Lake, Kolkata.